RTMP BB 86 (Cretaceous of Canada)

Also known as DPP, Bonebed 86

Where: Alberta, Canada (50.7° N, 111.5° W: paleocoordinates 58.1° N, 76.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dinosaur Park Formation (Belly River Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• Microvertebrate sites of Brinkman (1990) are "...placed in stratigraphic sequence by reference to a disconformity located about sixty meters below the base of the Lethbridge Coal (Eberth, 1990). The stratigraphic position of each site is expressed in terms of meteres above or below the disconformity (Fig. 2, Brinkman, 1990)."

• bed-level stratigraphic resolution

Environment/lithology: channel lag; lag, fine-grained, medium, pebbly, intraclastic sandstone and sandy, carbonaceous siltstone

• Characterized as in-channel, coastal plain. Facies association = Inclined heterolithic stratification (IHS) "comprising inclined decimeter-scale sandstone/mudstone interbeds (Thomas et al. 1987), has been interpreted as a lateral accretion deposit in fluvial (Wood, 1985) and tidally-influenced coastal-plain channels (Koster and Currie, 1987; Wood et al., 1988)." Upper flow-regime, tractional plane beds fromed during flood stage. Lag deposits, or plane bed deposits that show horizontal-planar stratification, bed thicknesses exceeding single pebble diameters, normal graded or fining upward texture, and matrix-supported clasts. The disconformity in southern Alberta records a Cordilleran uplift event west of the Park. (Eberth, 1990)
• "BB 86 occurs at the erosional base of a 1 m thick IHS sequence (Fig. 7F). the basal portion comprises a 40 cm thick bed of fine-to-medium-grained sandstone with 2-3 cm thick fining-upward laminae, capped by a sandy, carbonaceous plant-fragment-rich siltstone. The base of this unit is erosional and mudstone pebbles, as well as rare, extremely large dinosaurian elements are present in association with microfossils through the lowest few centimeters.

Size classes: macrofossils, mesofossils

Collected by L. J. Strong in 1986-1989; reposited in the TMP

Collection methods: bulk, surface (float), sieve,

• Screenwashed elements were collected using a screen with 9 openings per centimeter.

Primary reference: D. B. Brinkman. 1986. Microvertebrate sites: progress and prospectus. In B. G. Naylor (ed.), Field Trip Guidebook to Dinosaur Provincial Park, 2 June 1986. Dinosaur Systematics Symposium, Tyrrell Museum of Palaeontology, Drumheller, Alberta 24-37 [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 45264: authorized by John Alroy, entered by Robin Whatley on 15.10.2004, edited by Matthew Carrano, Philip Mannion and John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Teleostei -
 Teleostei - Aspidorhynchidae
 Elopiformes - Phyllodontidae
Paralbula casei2 Estes 1969
 Albuliformes - Albulidae
Coriops amnicolus2 Estes 1969 bonefish
 Salmoniformes -
Esocoidea indet.2 Bleeker 1859
 Amiiformes - Amiidae
"Kindleia sp." = Cyclurus2
"Kindleia sp." = Cyclurus2 Agassiz 1843 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
may be same as Atractosteus occidentalis in Table 1?
 Salientia -
Hensonbatrachus kermiti6 Gardner and Brinkman 2015 frog
TMP 86.23.32 (frontoparietal)
Tyrrellbatrachus brinkmani5 Gardner 2015 frog
TMP 2008.004.0018 (maxilla)
 Proteida - Batrachosauroididae
Opisthotriton kayi2 Auffenberg 1961 salamander
 Caudata - Urodela
Scapherpeton tectum2 Cope 1876 salamander
 Testudines - Trionychidae
Trionychinae indet.1 softshell turtle
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Panchelydridae
 Avetheropoda - Dromaeosauridae
cf. Dromaeosauridae indet.2 Colbert and Russell 1969 coelurosaur
Richardoestesia sp.3 Currie et al. 1990 coelurosaur
Saurornitholestes langstoni2 Sues 1978 coelurosaur
Dromaeosaurus sp.3 Matthew and Brown 1922 coelurosaur
 Avetheropoda - Troodontidae
Troodon formosus2 Leidy 1856 coelurosaur
 Avetheropoda -
Paronychodon sp.3 Cope 1876 coelurosaur
? Aves indet.3 Linnaeus 1758 bird
 Avetheropoda - Tyrannosauridae
Tyrannosauridae indet.2 Osborn 1906 tyrannosaurid
 Ornithischia -
Ankylosauria indet.2 ornithischian
 Neornithischia - Pachycephalosauridae
Pachycephalosauridae indet.3 Sternberg 1945 ornithischian
 Neornithischia - Ceratopsidae
Ceratopsidae indet.2 Marsh 1888 ceratopsid
 Neornithischia - Thescelosauridae
Thescelosaurus cf. neglectus2 Gilmore 1913 ornithischian
 Neornithischia - Hadrosauridae
Hadrosauridae indet.2 Cope 1869 hadrosaurid
 Crocodylia -
Leidyosuchus canadensis2 Lambe 1907 crocodilian
 Squamata -
 Choristodera -
Champsosaurus natator2 Parks 1933 choristodere
Mammalia indet.2 Linnaeus 1758 mammal
 Theriiformes -
Metatheria indet.3 Huxley 1880 metatherian
 Allotheria -
Multituberculata indet.3 Cope 1884 multituberculate